Machine for mounting snap fasteners or the like having tape advancing means



W. A. ERHARDT JR Oct 21,

1952 2,614,714 MACHINE FOR MOUNTING SNAP FASTENERS OR THE LIKE HAVING TAPE ADVANCING MEANS 3 Sheets-Sheet 1 Filed Dec. 19, 1946 Oct. 21, 1952 w. A. ERHARDT, JR

MACHINE FOR MOUNTING" SNAP FASTENERS OR THE LIKE HAVING TAPE ADVANCING MEANS 3 Sheets-Sheet 2 Fil ed Dec. 19, 1946 INVENTOR.

Oct. 21,1952 w. A. ERHARDT, JR 2,614,714

MACHINE FOR MOUNTING SNAP FASTENERS OR THE LIKE HAVING TAPE ADVANCING MEANS Filed Dec. 19, 1946 3 Sheets-Sheet 3 INVENTOR. fig am J2 Patented Oct. 21, 1952 MACHINE FOR MOUNTING SNAP FASTEN- ERS OR THE LIKE HAVING TAPE AD- VAN CING MEANS William A. Erhardt, Jr., Philadelphia,-Pa., 'assignor to Conso Fastener Corporation, Philadelphia, Pa., a. corporation of New York Application December 19, 194 Serial No. 717,223

6 Claims.

The present invention relates to certain new, useful and improved tape, sheet or strip feeding and controlling apparatus or mechanism for-use in conjunction with or attached to snap-fastenerattaching or grommet-attaching or eyelet-attaching machines, as, for instance, the fastenerattaching machines of the United-Carr Fastener Corp., of Cambridge, Mass, exemplified by their Model M-245 and also illustrated in their Patents Nos. 1,944,510; 2,028,704; and 1,873,890.

An object of the present invention is to effect an intermittent and automatic feeding of the tape, strip or sheet material (or the like) between the anvil and punch of a fastener-attaching machine, in timed relation to the cycle of operation of the fastener-attaching machine, so that successive snap-fasteners, grommets or eyelets (or similar elements) may be attached to successive spots on the fed tape, strip or band of fabric or other sheeting, at predetermined and selectable spaced intervals, and so that a failure of the strip, or of the attachment, will automatically stop the attaching machine.

Other objects of the invention are to provide such automatic tape-feeding, spacing and controlling apparatus which will be dependable in operation and will require a minimum of attention or supervision, and which maybe adjustable for the maximum range which may be required in respect to the spacing and in respect .to other dimensional or quantitative aspects of the operation.

With the above and other objects in view, the present embodiment of my invention consists of a tape-guide plate with a guide-slot or guidechannel formed therein, in which slot or channel the strip material passes; a reciprocating finger to move said tape or strip-material a predetermined distance in said channel during each cycle of the fastener-attaching machine; a looking gate to keep the tape from moving at the moment the machine is attaching a snap-fastener (or the like) to the tape or strip; a tension-control gate to stretch the tape or fabric tightly between the punch and anvil while a snap-fastener (or the like) is being attached to the tape or fabric; a feeler mechanism to shut off the fastener-attaching machine if no snap-fastener- (grommet or the like) attaches to the tape or,

strip; timing means to operate the tape-feeding or strip-feeding and controlling means in timed relation to each other and to the cycle of the fastener-attaching machine; and stripping means to remove the strip-and-fastener assembly from the ascending punch at the end of each cycle of the attaching machine.

For the purpose of illustrating the invention, there is shown in the accompanying drawings a form thereof which is at present preferred, although it is to be understood that the various instrumentalities of which the invention consists can be variously arranged and organized and that the invention is not limited to the precise arrangement and organization of the instrumentalities as herein shown and described.

The above and other objects in View will appear more fully from the followingdescription and accompanying drawings.

Referring to the accompanying drawings, in

which like reference characters refer (throughout) to like parts: i

Figure 1 represents a perspective view of a fastener-attaching machine, having one embodiment of the present invention applied; thereto.

Figure 2 represents a perspective view of the table of the fastener-attaching machine, with the embodiment of the present invention applied thereto.

Figure 3 represents a vertical sectional view along line 33 of Figure 2.

Figure 4 represents a vertical sectional view along line 4-4 of Figure 2.

Figure 5 represents a perspective view, partly in section, of the tension control gate.

Figure 6 represents a vertical sectional view along line 6-6 of Figure 5.

Figure '7 represents a top plan view of the table of the snap-fastener-attaching machine, with the ram and hoppers removed therefrom so as to better view the apparatus of my invention.

Figure 8 represents a vertical sectional view along line 8-8 of Figure '7.

Figure 9 represents a front elevational view of the feeler mechanism assembly.

Figure 10 represents a side elevational View of the feeler mechanism assembly.

Figure 11 represents a rear elevational View of the feeler mechanism assembly.

Figure 12 represents a perspective view of the locking-gate assembly.

The present invention may be applied to any fastener-attaching or similar machine, as exemplified, for instance, by Model M-245 of the United-Carr Fastener Corporation of Cambridge, Massachusetts, or to any machine adapted to fasten eyelets, grommets, snap-fasteners or the like to fabric or other material, wherein a feeder system automatically and intermittently supplies the elements of the snap-fastener, eyelet or grommet to the punch and anvil of the machine and which attaching machine (if so desired) can be Y 3 adjusted for automatically repetitive, intermittent operation.

The attaching machine may be set or adjusted to operate automatically in such manner that grommets or eyelets or fasteners will be applied in rapid succession to any material placed between the punch and anvil of the machine. Although the present embodiment of my invention is shown applied to a United-Carr Fastener Corp. snap-fastener attaching machine Model M-245, it is to be understood that my invention can be applied to other attaching machines. Insofar as any part of the construction or of the mode of operation of the fastener-attaching machine (generally shown in the drawings) is not described in detail, it may be assumed to be generally that described in the United States patents of United-Carr Fastener Corp. on their Model M-245 machine (as, for instance, Patents 1,944,510; 2,028,704; 1,873,890) or of any conventional form or construction or as described in my co-pending divisional application Serial No. 85,008, filed April 1, 1949.

Referring to Figure 1, numeral [5 represents, generally, the fastener-attaching machine, ineluding a table I I supported by legs or frame I2, with table II supporting an anvil l3 and ramhousing l4. Ram-housing l4, encloses the reciprocable punch l6 and the member l4-a (Fig. 3) for mounting the reciprocable element-gripping jaws 26 for gripping one of the elements of a 2-piece fastener unit; the ram housing also carrying the hopper-supporting arms I! and I8.- A

quantity of the fastener elements of the fastener unit is placed in the hopper l9 which is supported by an arm [7. These elements eventually will be secured to the upper side of fabricstrip, tape (or the like) 22, by the prongs of a complementary fastener-element 21.

The fastener-element 2|] is fed from the hopper l9 down a chute 23 to tucker-track 24 where a reciprocating tucker pushes it along the tucker-track 24, and finally between grippingjaws 25. In like manner, the complementary fastener-element 21 of the fastener unit is fed from hopper 28, down chute 29, to tucker-track 30, where the reciprocating tucker 3| pushes it along tucker-track 30,-and finally places it between jaws I50 and I0] on the head 32 of anvil 13. The disposition and operation of these jaws and anvil is better seen in United States Patent No. 1,944,510. At the proper moment, jaws 26, carrying upper fastener-element 25, are forced downward by the punch 16 until stopped by the limiting flanges l4-c; whereupon the punch 16 continues its descent and forces the fastenerelement 20 from between the jaws 26 and places it on top of tape or fabric-strip 22. Punch 16 pushes the element 20 against the tape 22 with sufficient force to cause the prongs of element 21 to pierce the tape 22, and to clinch themselves in fastener-element 20 (with the tape 22 between the elements 20 and 21), to form the assembly shown in Figure 9.

Further details of the fastener-attaching machine are not material to the full understanding of the operation of my present invention, but such details of the fastener-attaching machine are more fully described in the United States Patents Nos. 1,944,510; 2,028,704; 1,873,890 of the United-Carr Fastener Corp, and are-exemplified by the Model M-245, machine, of United-Carr Fastener Corp.

The present embodiment of my invention includes a, tape-guide plate 33', which may be fastened by suitable brackets (not shown) and bolts 34 to the table II of the fastener-attaching machine, and which has a slot, channel or passageway 3-5 therein, to guide the fabric or tape 22 while traveling from the supply-roll 36 across the plate 33. The roll 36 may be mounted on any suitable bracket 3], which may be fastened to one leg of the frame of the fastener-attaching machine, or may be supported in any other manner permitting the fabric or tape 22 to freely unroll from the supply-roll 36 into the channel 35.

Across the channel 35 on the plate 33, at the point where the tape 22 first enters groove or channel 35, a barrier 38 may be placed, to direct tape 22 at all times into channel 35.

The tape 22 (in channel 35) next passes between tension-control gate 39 and the bottom surface of the channel 35. This is best shown in Figures 3, 5 and 6. The tension-control gate may include an inverted U-shaped housing 40, through which passes a horizontal pivot 4| (Figure 6), which pivot has screwed (or otherwise aflixed) to it (in the space within the housing 40) a tape-contacting blade 42. The pivot 4| carries a screw-threaded arm 43 at its outer end, to which arm an internally screw-threaded weight 44 and locking nut 45 are attached. The weight 44 can be adjustably moved along the length of screw-threaded arm 43, thereby changing the clockwise moment which presses blade 42 against the surface of tape 22. The pressure of blade 42 against the tape 22 can be thus adjusted so as to stretch tape 22 across the anvil 13 when the fastener-elements are being attached to the tape, but, which also permits tape 22 to be moved beneath blade 42 by the pulling action of finger 62. The tape 22 next passes between thepunch l6 and anvil I3, where a fastener-member is attached to the tape in the manner described in United States Patent No. 1,944,510.

After a fastener is aflixed to the tape, the fastener and tape assembly pass along channel 35 under the feeler mechanism 46. This is best illustrated in Figures 9, 10 and 11. The mechanism may be an electrical switch consisting of a fixed contact 4'! and a movable contact 48. The movable contact 48 is fastened to one end of arms49, and to the other end of said arm is affixed an adjustable contacting-block or planar element 50. This contacting-block rides on the tops of the fasteners passing along channel 35, and if no fastener appears in its predetermined position on the tape 22, the contacting block 50 drops, causing the arms 49 to move about the pivot .51 and lift contact 48 away from contact 41. The breaking of this contact opens the electrical circuit which provides power to operate the motor of the fastener-attaching machine, andv as a result the entire machine ceases to operate. The failure of the machine to operate indicates to the operator that a fastener has not been attached in its proper place on the tape, or that the tape has completely passed from roll .36, -or that fastener-elements are not being supplied to the anvils. Thus, the mechanism operates as an automatic signal to indicate to the operator that the machine needs attention.

After passing beneath the feeler mechanism, the fastener-carrying tape travels under a locking gate 52, best seen in Figures 1, Band 12. The

locking-gate 52 may .consist of an arm 53, pivoting about a pin 54 which is held in support 55. This support is fastened to the tape-guide plate 33 by a bolt 56.. The arm 53 carries at one end a serrated-edged portcullis 57 which toothed edge is designed to fall on the surface-of the tape 22 (preventing said tape from moving in channel 35 motion thereof) until a lifting-bar 60 rises to,

contact the adjustable screw 61, pivoting arm 53 about pin 54, and forcing portcullis 51 into contact with the tape 22.

The tape 22 is moved along channel 35 in tapeguide plate 33 by a reciprocating finger 62. This finger 62 is carried by an arm 63 attached to the spacer bracket-block E4. The finger, and its associated parts, is best seen in Figures .1, 3, 4, '7 and 8. The source of power which is used to drive this spacer bracket-block back and forth is the same as is used to operate the rest of the fastener-attaching machine, and is a motor (not shown), beneath the table H, which drives the power take-offshaft 65. The use and arrange- 1 ment of this motor and the attachment thereto of the power take-off shaft 65 is well known to those skilled in the art.

The power take-off shaft 65 drives a chain belt 66 which turns a gear-wheel 61 and the shaft 68 attached hereto. Aifixed to one end of the shaft 68 is bevel-gear 59 which engages, and causes to revolve, a mating bevel-gear f8 andthe shaft H attached thereto. Shafts 68 and H revolve in bearing blocks l2 and i3 respectively.

A crank 14 is attached to the end of the shaft H opposite the bevel-gear Hi. This crank has a slot 15, wherein is fitted slide 76. With the unscrewing of pin-bolt ll, slide i6 is free to move in slot 15, and the diameter of a circle described by the revolving pin-bolt I! can thereby be increased or decreased.

Crank-arm 18 is attached to crank 74 by pinbolt H. This crank-arm it has, at its end opposite from the end attached to the crank 14,

One end of the arm 86 (the end opposite from that which carries roller 85) is bent at a 90 angle and lies directly beneath pins 92 carried in suitable holes in the bearing-block 50. When the cam 84 forces the roller 85 (and the end of the arm 86 to which said roller is attached) downward, the opposite end of arm 86 moves upward, pushing the contacting pins 92 against the bar 65. It is this action which causes bar 60 tomove up or down as heretoforedescribed.

After tape 22 is moved along channel 35 beyond the finger 62, it passes through a hole 93 in the tape-guide plate 33, and then down a trough 94 into a receiving box 95. 1

The timing of gears, chain drives, camsand cranks movesthe locking gate and finger in proper timed relation to the cycle of the jaws and punch. V

The operation of the fastener-attaching machine, with the present embodiment of my invention applied thereto, is as follows:

The hoppers l9 and 28 and the chutes 23 and 29 are filled with fastener-elements in such manner that the reciprocating punch I6 and anvil I3 will attach fastener-elements to the tape placed between said punch and anvil. The tape 22 is unrolled from the spool 25, passed beneath the barrier 33 into the channel 35, moved beneath the tension control-gate blade 42, between the punch crank 24 moves the spacer bracket-block 64 and a connecting pin lfi'which is fastened to the sliding spacer bracket-block 64. A reciprocating motion is thereby transmitted to the spacer bracketblock 64 by the revolving crank and crank arm,

' causing spacer bracket-block 62 to travel back 82 tends, at all times, to push finger 62 down against the tape 22. During certain periods of the reciprocating travel of spacer-bracket block 64,1,hoWever, the lifting bar 68 lifts the arm 63 and the finger 62 away from the tape 22. Because the length of the lifting-bar 63 exceeds the maximum travel of the block 64, this lifting motion can be imparted to the arm 63 at any position of the block 64 in the bearing 88. One end of liftingbar 60 strikes and moves locking gate 52 as heretofore described.

Referring to Figures 3, '7 and 8, shaft 68 (revolving in bearing blocks 12) turns the cam 84 and causes a roller 85, attached to one end of the rocker-arm 86, to turn about pivot pin 81 carried in the support 83. As can be seen in Fig. 8, the roller 85 is forced downward when in contact with edge 83 of cam 84, and said roller will rise when in contact with edge 95 of the cam 84. A spring 91 tends to move the arm 86 in a clockwise direction about pin 81, thereby forcing the roller 85 into contact with the surfaces ofv the cam 84 at all times.

finger 62 toward the punch. Meanwhile the tension control gate 59 has stretched the tape 22 between itself and the locking gate 52, whereupon the punch and anvil of the machine attach a fastener member to the tape. Whenthe spacer bracket-block, 64 and finger 62 have reached the end of travel toward the punch (said limit of travel having been predetermined by the position of the slide'lfi in the slot of the crank 14), the fastener has been attached to the tape, the bar 60 falls, finger 62 drops into contact with the tape 22, and the locking-gate portcullis 5'! rises. Then the finger 62 moves away from the punch, pulling along with it the tape 22, until the finger 62 reachesthe limit of its travel in this direction. Thus the fastener, attached to the tape, is carried under the block 56 of the feeler mechanism 46. Then the above cycle is repeated, and other fasteners are attached to the tape 22. It is obvious that the distance between the fasteners when attached to the tape will be equal to the distance that the sliding bracket-block 64 travels in the bearing 80, and this distance can be regulated and changed by properly adjusting the position of the bolt Ti and the slide 16 on the crank 74.

Therefore, fasteners can be attached to a strip compressed air, from any convenient source,

through a valve 96 and hoses 91 and 98 to hoppers l9 and 28 respectively. These streams of compressed air force a supply of elements down chutes 23 and 29. I may also arrange hoses so as to suitably direct streams of compressed air along said chutes 23 and 29, and also along tuckertracks 24 and 31] to prevent fastener elements from jamming in the carrier-grooves of said tracks and chutes.

Because the aforementioned cycle of operation is rapid and because there is a tendency for the fastener to adhere to the tip of the punch as said punch ascends, I may provide a stripper which will disengage the fastener element from the punch after the fastener elements have been attached to the tape. This stripper, which is covered by my divisional application Serial No. 85,008 referred to above, is best illustrated in said application.

Instead of attaching female fastener-elements 20 and 21 to a fabric, 1'. may prefer to attach male fastener-elements to the tape, or any other style or typed grommet or eyelet or the like. To fasten these other types, I need only change the conformation of the surfaces of punch l 6 or anvil 32 in a manner well known to those skilled in the art. 7

The present invention may be embodied in other specific forms Without departing from the spirit or essential attributes thereof, and it is therefore desired that the present embodiment be considered in all respects as illustrative and not restrictive, reference being had to the appended claims rather than to the foregoing description to indicate the scope of the invention.

Having thus described my invention, I claim as new and desire to protect by Letters Patent:

1. For use with an automatic-feed machine having a self-stripping reciprocable punch for attaching grommets, eyelets, snap-fasteners or like elements to an elongated tape or the like; mechanism constructed and arranged to provide uniform and accurate spacing of said elements upon said tape, said mechanism comprising a guide-plate for said tape, an oscillating tapeadvancing finger for momentarily gripping said tape at a'point spaced from said punch and longitudinally intermediate the afiixed elements and for moving said tape a predetermined distance between punching operations, a reciprocable locking-gate disposed in operative juxtaposition to said guide-plate between said finger and said punch, said locking-gate being constructed and arranged to move downwardly against said tape into the path of each successive affixed element and thereby to stop further movement of said tape at the end of each tape-advancing step, and yieldable means disposed on the other side of said punch from said locking-gate for frictionally restraining'the forward movement of said tape thereby tokeep said tape relatively taut during and after each punching operation.

2. For use with an automatic-feed machine having a self-stripping reciprocable punch for attaching grommets, eyelets, snap-fasteners or like elements to an elongated, tape or the like; mechanism constructed and arranged to provide uniform and accurate spacing of said elements upon said tape, said mechanism comprising a guide-plate for said tape, an oscillating tape-advancing finger for momentarily gripping said tape at a point spaced from said punch and 1ongitudinally intermediate the afiixed elements and for moving said tape a predetermined distance between punching operations, a reciprocable locking-gate disposed in operative juxtaposition to said guide-plate between said finger and said punch, said locking-gate being constructed and arranged to move downwardly. against said tape into the path of each successive aflixed element and thereby to stop further movement of said tape at the end of each tape-advancing step, means for maintaining said tape relatively taut during and after. each punching operation, and

mechanism constructed and arranged to indicate failure of the machine to affix an element in proper predetermined position on said tape, said mechanism including a movably mounted planar element disposed in operative juxtaposition to said guide-plate between said locking-gate and said punch and having a longitudinal dimension slightly greater than the predetermined distanc between successive affixed elements, said planar element being normally adapted to rest upon th tops of successive affixed elements and to be held in an elevated position thereby but being free to move to a lowered position in the absence of a correctly spaced affixed element.

3. For use with an automatic-feed machine having a self-stripping reciprocable punch for attaching grommets, eyelets, snap-fasteners or like elements to an elongated tape or the like;

mechanism constructed and arranged to provide uniform and accurate spacing of said elements upon said tape, said mechanism comprising a guide-plate for said tape, an oscillating tapeadvancing' finger for momentarily gripping said tape at a point spaced from said punch and longitudinally intermediate the aifixed elements and for moving said tape a predetermined distance between punching operations, a reciprocable locking-gate disposed in operative juxtaposition to said guide-plate between said finger and said punch, said locking-gate being constructed and arranged to move downwardly against said tape into the path of each successive aflixed element and thereby to stop further movement of said tape at the end of each tape-advancing step, means for maintaining said tape relatively taut during and after each punching operation, and means for automatically stopping the machine when it fails to affix an element in proper predetermined position on said tape, said last-mentioned means including an on-off switch operatively connected in the power-line leadingto the machine, said switch having a fixed contact, and a movable contact,- and an elongated feeler block extending longitudinally for somewhat more than the predetermineddistance between successive affixed elements, said feeler block. being: op-

eratively connected to the movable switch, ele-. ment and being movably mounted in juxtapositionto said guide plate, said feeler block normally resting upon the tops of successive affixed. elements and being maintained in elevated position thereby but being free to move downward, so as,

to open the switch in the absence of aproperly spaced afiixed element.

4. For use with an automatic-feed machine having a self-stripping reciprocable punch for attaching grommets, eyelets, snap-fasteners or like, elements to an elongated tape or the like; mechanism constructed and arranged to provide uniform and accurate spacing of said elements upon, said tape, saidmechanism comprising a guide-plate for said tape, an oscillating tape-advancing finger for. momentarily gripping said tap at a point spaced-from said punch and 1on gitudinally intermediate the-affixed elements and for moving said tape a predetermined distance between punching operations, a reciprocable locking-gate disposed in operative juxtaposition to said guide-plate between said finger and said punch, said locking-gate being constructed and arranged to move downwardly against said tape into the path of each successive affixed element and thereby-to stop further movement of said tape at the end of each tape-advancing step, means for maintaining said tape relatively taut during and after each punching operation, and

rocable bar constructed and arranged intermittently to move the free end of said finger away from said tape against the action of said springmeans.

6. For use with an automatic-feed machine having a self-stripping reciprocable punch for attaching grommets, eyelets, snap-fasteners or i like elements to an elongated tape or the like;

means for automatically stopping the'machine when it fails to afiix an element in proper predetermined position on said tape, said last-mentioned means including an on-ofr" switch operatively connected in the power-line leading to the machine, said switch having a fixed contact and a movable contact, a feeler block disposed in operative juxtaposition to the guide-plate and having a longitudinal dimension somewhat greater than the predetermined distance between successive arfixed elements, and a supporting arm pivotally interconnecting the -feeler block and the movable switch contact, said feeler block normally bearing against the tops of successive aflixed elements but being constructed and arranged to move toward the tape in the absence of a properly spaced afiixed element thereby to move the movable switch contact to open position. 1

5. For use with an automatic-feed machine having a self-stripping reciprocable punch for attaching grommets, eyelets, snap-fasteners or like elements to an elongated tape or the like; mechanism constructed and arranged to provide uniform and accurate spacing of said elements upon said tape, said mechanism comprising a guide-plate for said tape, tape-advancing means for moving said tape a predetermined distance between punching operations, a reciprocable locking-gate disposedin operative juxtaposition to said guide-plate between said tape-advancing means and said punch, said locking-gate being constructed and arranged to move downwardly against said tape into the path of each successive afiixed element and thereby to stop furthermovement of said tape at the end of each tape-advancing step, and yieldable means disposed on the other side of said punch from said lockinggate for frictionally restraining the forward. movement of said tape thereby to keep said tape relatively taut during and after each punching operation, said tape-advancing means including a horizontally-reciprocable block, a tape-gripping finger pivotally mounted upon said block with its free end vertically movable relative ,thereto, spring-means tensioning said fingerin the direction of the tape, and a vertically-recipmechanism constructed and arranged to provide uniform and accurate spacing of said elements upon said tape, said mechanism comprising a guide-plate for said tape, tape-advancing means formoving said tape a predetermined distance between punching operations, a reciprocable locking-gate disposed in operative juxtaposition to said guide-plate between said tapeadvancing means and said punch, said lockinggate being constructed and arranged to move downwardly against said tape into the path of each successive afiixed element and thereby to stop further movement of said tape at the end of each tape-advancing step, and yieldable means disposed on the other side of said punch from said locking-gate for frictionally restraining the forward movement of said tape thereby to keep said tape relatively taut during and after each punching operation, said tape-advancing means including a horizontally-reciprocable block, means for adjusting the. extent of horizontal movement of said block, a tape-gripping finger pivotally mounted upon said block with its free end vertically movable relative thereto, springmeans tensioning said finger in the direction of the tape, and'a vertically-reciprocable bar con-- structed and arranged intermittently to move the free end of said finger away from said tape against the action of said spring-means.

. WILLIAM A. ERHARDT, JR.

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